Metro: Last Light's third piece of DLC, the Developer Pack, will arrive next week. The pack includes one new solo mission called "The Spider's Nest," which challenges players to escape from a "spider infested catacomb" while carrying a flamethrower. It also features a shooting range for players to test out gun and attachment combinations, a "Metro Museum" gallery and AI arena to play with custom human and mutant squads.

The Developer Pack will be free for Season Pass holders, or $3.99, £3.19 and €3.99 on its own. It will launch on Steam, Xbox 360 and PS3 on September 17, while European PS3 owners will have to wait one more day for it to arrive on September 18.